package util.filter;

import util.TokenHelper;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName = "TokenFilter",urlPatterns = {"/*"})
public class TokenFilter implements Filter {
    public void init(FilterConfig config) throws ServletException {

    }
    public void doFilter(ServletRequest req, ServletResponse resp,
                         FilterChain chain) throws ServletException, IOException {
        System.out.println("TokenFilter - encoding begins");
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        String path = request.getRequestURI();
        Object token = request.getSession().getAttribute("token");
        if(token!=null) {
            TokenHelper.verify(token.toString(), response).toString();
        }
        chain.doFilter(req, resp);
        System.out.println("TokenFilter - encoding ends");
    }
    public void destroy() {
    }
}